'Beaver Fever' Is Caused by the Giardia Duodenalis Parasite That

'Beaver fever' is caused by the Giardia duodenalis parasite that can be present in lake water. The best way to avoid beaver fever is to

A) not swim in lakes where Giardia duodenalis is present.
B) avoid eating infected beaver meat.
C) avoid drinking water from lakes where Giardia duodenalis is present.
D) avoid getting too cold while swimming.